Article
Agricultural Engineering
Aijun Zhu, Yu Qin, Jing Wu, Min Ye, Yu-You Li
Summary: The optimal performance was achieved in the thermophilic anaerobic co-digestion process of sewage sludge with paper waste at a ratio of 4:6, where the COD removal efficiency and biogas production increased significantly. The addition of paper waste had a positive impact on the competition between carbohydrate and protein degradation, with cellulolytic bacteria becoming the predominant group.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Lei Zhang, Yiyang Yuan, Yingdi Zhang, Yang Liu
Summary: This study investigates the feasibility of using calcium hypochlorite (Ca(ClO)(2)) to improve the thermophilic digestion of anaerobic wasted activated sludge (WAS). The results show that Ca(ClO)(2) pretreatment significantly enhances the removal efficiency and methane yield of WAS under low organic loading rate (OLR) conditions. However, the pretreatment effect is not significant under high OLR conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Meng Gao, Siqi Li, Huijing Zou, Fushan Wen, Anrong Cai, Ruilin Zhu, Wenjing Tian, Dezhi Shi, Hongxiang Chai, Li Gu
Summary: Anaerobic digestion (AD) is a sustainable method for recovering energy from organic wastes, but the efficiency for waste activated sludge (WAS) is limited due to WAS hydrolysis constraints. This study proposes a strategy to treat WAS and landfill leachate simultaneously, aiming to enhance WAS hydrolysis and organic conversion to methane. The effects of landfill leachate on the different stages of AD of WAS were investigated, showing that appropriate amounts of leachate can promote solubilization, hydrolysis, and acidogenesis, but not methanogenesis. Mechanism studies revealed the beneficial effects of humic acid in leachate on hydrolysis and acidogenesis, and the dose-dependent effects of heavy metals on the AD process. Additionally, microbial community analysis showed an increase in microbes responsible for hydrolysis and acidogenesis with the presence of landfill leachate.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Richard P. Taylor, Clifford L. W. Jones, Richard K. Laubscher
Summary: There is potential to anaerobically digest sludge and algal biomass from brewery effluent treatment processes to produce methane. The study evaluated the use of waste biomasses for methane production and recommended operating anaerobic digesters at specific feeding rates. Algal-fed digesters showed higher methane content and lower carbon dioxide content compared to waste activated sludge-fed digesters, making it a promising substrate for biogas production.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Xiaoling Zhao, Min Liu, Shipeng Yang, Hui Gong, Jinyuan Ma, Caibin Li, Kaijun Wang
Summary: Temperature Staging and Biological Phasing (TSBP) is an improved anaerobic digestion technology for treating waste activated sludge. The stable operation of TSBP system showed significant biogas production and organic matter degradation. Microbial community analysis revealed the dominance of Proteobacteria and Firmicutes, and aceticlastic methanogenesis was identified as the major pathway for methane production in this system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Ahmad Shabir Razavi, Farokhlaqa Kakar, Ehssan Hosseini Koupaie, Hisham Hafez, Elsayed Elbeshbishy
Summary: The study found that hydrothermal pretreatment can enhance solubilization of thickened waste activated sludge but did not improve biomethane production. The optimal selection of temperature and retention time for hydrothermal pretreatment significantly impacts the outcomes.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Hongbo Liu, Xingkang Wang, Yueying Fang, Wenjia Lai, Suyun Xu, Eric Lichtfouse
Summary: Biochar addition to anaerobic digestion systems improves methane production, and the residues of anaerobic digestion can be recycled into new biochar. The study found that the residue biochar produced the highest methane yield, possibly due to its higher abundance of basic groups and electroactive microorganisms.
Article
Energy & Fuels
Monika Zubrowska-Sudol, Katarzyna Sytek-Szmeichel, Piotr Krawczyk, Agnieszka Bisak
Summary: This study evaluated the impact of mechanical disintegration of waste activated sludge on anaerobic digestion, and found that increasing the energy density used in disintegration resulted in higher release of organic compounds. The percentage of sludge subjected to disintegration was also identified as a crucial factor affecting biogas production efficiency.
Article
Environmental Sciences
Alicja Machnicka, Klaudiusz Grubel
Summary: The aim of this research was to explore the application of waste activated sludge (WAS) pretreatment processes in anaerobic digestion. The results showed significant reductions in pathogenic bacteria, coliphages, and parasite eggs using hydrodynamic disintegration and freezing/thawing disintegration methods. The hybrid disintegration method achieved the best results.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Rong Zhang, Min Zhang, Huaqian Mou, Zijing An, Hailu Fu, Xiaomei Su, Chongjun Chen, Jianrong Chen, Hongjun Lin, Faqian Sun
Summary: Kitchen waste biochar showed better performance in thermophilic co-digestion, reducing the digestion time and increasing methane production. It also improved the microbial community structure and enhanced the acetoclastic methanogenesis in thermophilic co-digestion.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Environmental
Bikash R. Tiwari, Satinder Kaur Brar, Rao Y. Surampalli
Summary: Thermophilic anaerobic digestion is a viable strategy to reduce municipal sludge volume and generate renewable energy. In this study, ultrasonication was found to be the best pretreatment method to enhance the digestion process.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Agricultural Engineering
Jungsu Park, Roent Dune A. Cayetano, Gi-Beom Kim, Yura Jo, Yeelyung Kwon, Zhongfang Lei, Sang-Hyoun Kim
Summary: Alkaline-thermal pretreatment at 60 degrees Celsius and pH 10 for 24 hours resulted in higher methane yield and maximum net savings for WAS. Considering the degree of sludge disintegration and microbial growth are better indicators for predicting anaerobic digestibility performance.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Marinus J. Moerland, Laura Castanares Perez, Maria E. Ruiz Velasco Sobrino, Paraschos Chatzopoulos, Brendo Meulman, Vinnie de Wilde, Grietje Zeeman, Cees J. N. Buisman, Miriam H. A. van Eekert
Summary: Thermophilic and hyper-thermophilic anaerobic digestion are effective methods for treating concentrated black water, achieving efficient COD removal and methane production with a shorter start-up time, but may result in lower methane production rates at high temperatures.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Tayane Miranda Silva de Castro, Magali Christe Cammarota, Elen Beatriz Acordi Vasques Pacheco
Summary: Anaerobic co-digestion of excess biological sludge from oil refineries with food waste rich in fruits and vegetables can effectively increase biogas yield and volatile solids reduction. The best condition involves mixing waste activated sludge without dewatering with food waste in an 80:20 ratio, resulting in significantly higher VS removal and biogas production compared to mono-digestion of sludge alone.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Agricultural Engineering
Yufen Wang, Kaixin Zheng, Haixiao Guo, Yindong Tong, Tingting Zhu, Yiwen Liu
Summary: This study revealed that vivianite significantly inhibits anaerobic digestion of waste activated sludge, leading to a decrease in methane yield, an increase in substrate remaining, and an impact on microbial communities.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)